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* lisp/delim-col.el (delimit-columns-region): Delegate to `delimit-columns-rectangle' when called with a rectangular region (bug#36453).
2339 lines
87 KiB
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2339 lines
87 KiB
Plaintext
GNU Emacs NEWS -- history of user-visible changes.
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Copyright (C) 2017-2019 Free Software Foundation, Inc.
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See the end of the file for license conditions.
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Please send Emacs bug reports to 'bug-gnu-emacs@gnu.org'.
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If possible, use 'M-x report-emacs-bug'.
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This file is about changes in Emacs version 27.
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See file HISTORY for a list of GNU Emacs versions and release dates.
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See files NEWS.26, NEWS.25, ..., NEWS.18, and NEWS.1-17 for changes
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in older Emacs versions.
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You can narrow news to a specific version by calling 'view-emacs-news'
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with a prefix argument or by typing 'C-u C-h C-n'.
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Temporary note:
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+++ indicates that all necessary documentation updates are complete.
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(This means all relevant manuals in doc/ AND lisp doc-strings.)
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--- means no change in the manuals is needed.
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When you add a new item, use the appropriate mark if you are sure it applies,
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* Installation Changes in Emacs 27.1
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** Emacs now uses GMP, the GNU Multiple Precision library.
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By default, if 'configure' does not find a suitable libgmp, it
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arranges for the included mini-gmp library to be built and used.
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The new 'configure' option '--without-libgmp' uses mini-gmp even if a
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suitable libgmp is available.
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** Emacs can now use HarfBuzz as its shaping engine.
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The new configure option '--with-harfbuzz' adds support for the
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HarfBuzz text shaping engine. It is on by default; use './configure
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--without-harfbuzz' to build without it. The HarfBuzz text shaping is
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available via new font backend drivers 'xfthb' and 'ftcrhb' for Xft
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and Cairo drawings, respectively, and via the 'harfbuzz' backend on
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MS-Windows. The Harfbuzz text shaping is preferred to the previously
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supported ones, so the font backends that use older shaping engines
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(FLT on GNU and Unix systems and Uniscribe on MS-Windows) are not
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enabled by default; they can be enabled via the 'font-backend' frame
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parameter or via X resources.
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** The new configure option '--with-json' adds support for JSON using
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the Jansson library. It is on by default; use './configure
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--with-json=no' to build without Jansson support. The new JSON
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functions 'json-serialize', 'json-insert', 'json-parse-string', and
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'json-parse-buffer' are typically much faster than their Lisp
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counterparts from json.el.
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** The configure option --with-cairo is no longer experimental.
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This builds Emacs with Cairo drawing, and supports built-in printing
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when Emacs is built with GTK+.
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** Emacs no longer defaults to using ImageMagick to display images,
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due to security and stability concerns. To override the default, use
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'configure --with-imagemagick'.
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** Several configure options now accept an option-argument 'ifavailable'.
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For example, './configure --with-xpm=ifavailable' now configures Emacs
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to attempt to use libxpm but to continue building even if libxpm is
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absent. The other affected options are '--with-gif', '--with-gnutls',
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'--with-jpeg', '--with-png', and '--with-tiff'.
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** The etags program now uses the C library's regular expression matcher
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when possible, and a compatible regex substitute otherwise. This will
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let developers maintain Emacs's own regex code without having to also
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support other programs. The new configure option '--without-included-regex'
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forces etags to use the C library's regex matcher even if the regex
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substitute ordinarily would be used to work around compatibility problems.
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** Emacs has been ported to the '-fcheck-pointer-bounds' option of GCC.
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This causes Emacs to check bounds of some arrays addressed by its
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internal pointers, which can be helpful when debugging the Emacs
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interpreter or modules that it uses. If your platform supports it you
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can enable it when configuring, e.g., './configure CFLAGS="-g3 -O2
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-mmpx -fcheck-pointer-bounds"' on Intel MPX platforms.
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** Emacs now normally uses a C pointer type instead of a C integer
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type to implement Lisp_Object, which is the fundamental machine word
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type internal to the Emacs Lisp interpreter. This change aims to
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catch typos and supports '-fcheck-pointer-bounds'. The 'configure'
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option '--enable-check-lisp-object-type' is therefore no longer as
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useful and so is no longer enabled by default in developer builds,
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||
to reduce differences between developer and production builds.
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+++
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** Emacs now uses a "portable dumper" instead of unexec.
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This improves compatibility with memory allocation on modern systems,
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and in particular better supports the Address Space Layout
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Randomization (ASLR) feature, a security technique used by most modern
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operating systems.
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Portable dumping can be disabled at configure time via the configure
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option '--with-dumping=unexec' (but we don't recommend that, unless
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the portable dumping doesn't work on your system for some
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reason---please report such systems to the Emacs developers as bugs).
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When built with the portable dumping support (which is the default),
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Emacs looks for the 'emacs.pdmp' file, generated during the build, in
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its data directory at startup, and loads the dumped state from there.
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The new command-line argument '--dump-file=FILE' allows to specify a
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non-default '.pdmp' file to load the state from; see the node "Initial
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Options" in the Emacs manual for more information.
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+++
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** The new configure option '--enable-checking=structs' attempts to
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check that the portable dumper code has been updated to match the last
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change to one of the data structures that it relies on.
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+++
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** The configure options '--enable-checking=conslist' and
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'--enable-checking=xmallocoverrun' have been withdrawn. The former
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made Emacs irredeemably slow, and the latter made it crash. Neither
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||
option was useful with modern debugging tools such as AddressSanitizer.
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(See etc/DEBUG for the details of using the modern replacements of the
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removed configure options.)
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+++
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** The distribution tarball now has test cases; 'make check' runs them.
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This is intended mostly to help developers.
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---
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** Emacs now requires GTK 2.24 and GTK 3.10 for the GTK 2 and GTK 3
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builds respectively.
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---
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** The toolbar now shows the equivalent key binding in its tooltips.
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* Startup Changes in Emacs 27.1
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+++
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** Emacs can now be configured using an early init file.
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The file is called 'early-init.el', in 'user-emacs-directory'. It is
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loaded very early in the startup process: before graphical elements
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such as the tool bar are initialized, and before the package manager
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is initialized. The primary purpose is to allow customizing how the
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package system is initialized given that initialization now happens
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before loading the regular init file (see below).
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We recommend against putting any customizations in this file that
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don't need to be set up before initializing installed add-on packages,
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because the early init file is read too early into the startup
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process, and some important parts of the Emacs session, such as
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'window-system' and other GUI features, are not yet set up, which could
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make some customization fail to work.
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+++
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** Installed packages are now activated *before* loading the init file.
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This is part of a change intended to eliminate the behavior of
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package.el inserting a call to 'package-initialize' into the init
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file, which was previously done when Emacs was started. As a result
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of this change, it is no longer necessary to call 'package-initialize'
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in your init file.
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However, if your init file changes the values of 'package-load-list'
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or 'package-user-dir', or sets 'package-enable-at-startup' to nil then
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it won't work right without some adjustment:
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- You can move that code to the early init file (see above), so those
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settings apply before Emacs tries to activate the packages.
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- You can use the new 'package-quickstart' so activation of packages
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does not need to pay attention to 'package-load-list' or
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'package-user-dir' any more.
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---
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** Emacs now notifies systemd when startup finishes or shutdown begins.
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Units that are ordered after 'emacs.service' will only be started
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after Emacs has finished initialization and is ready for use.
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(If your Emacs is installed in a non-standard location and you copied the
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emacs.service file to eg "~/.config/systemd/user/", you will need to copy
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the new version of the file again.)
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+++
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** New option 'help-enable-completion-auto-load'.
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This allows disabling the new feature introduced in Emacs 26.1 which
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loads files during completion of 'C-h f' and 'C-h v' according to
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'definition-prefixes'.
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* Changes in Emacs 27.1
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** emacsclient
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*** Previously, when an alternate editor is started
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(--alternate-editor/-a), and there was an --eval switch, these
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parameters were used as file names for the alternate editor.
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emacsclient will now instead start the alternate editor without these
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parameters.
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+++
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*** emacsclient now supports the 'EMACS_SOCKET_NAME' environment variable.
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The behavior is identical to 'EMACS_SERVER_FILE', in that the
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command-line value specified via '--socket-name' will override the
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environment, and the natural default to 'TMPDIR', then "/tmp", continues
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to apply.
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+++
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*** Emacs and emacsclient now default to "$XDG_RUNTIME_DIR/emacs"
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as the directory for client/server sockets, if Emacs is running
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under an X Window System desktop that sets the 'XDG_RUNTIME_DIR'
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environment variable to indicate where session sockets should go.
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To get the old, less-secure behavior, you can set the
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'EMACS_SOCKET_NAME' environment variable to an appropriate value.
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---
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*** When run by root, emacsclient no longer connects to non-root sockets.
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(Instead you can use Tramp methods to run root commands in a non-root Emacs.)
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---
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** Control of the threshold for using the 'distant-foreground' color.
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The threshold for color distance below which the 'distant-foreground'
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color of the face will be used instead of the foreground color can now
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be controlled via the new variable 'face-near-same-color-threshold'.
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The default value is 30000, as the previously hard-coded threshold.
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+++
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** The function 'read-passwd' uses "*" as default character to hide passwords.
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** Lexical binding is now used when evaluating interactive Elisp forms.
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More specifically, lexical-binding is now used for 'M-:', '--eval', as
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well as in the "*scratch*" and "*ielm*" buffers.
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||
---
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||
** The new option 'tooltip-resize-echo-area' avoids truncating tooltip text
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on GUI frames when tooltips are displayed in the echo area. Instead,
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it resizes the echo area as needed to accommodate the full tool-tip
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text.
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---
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** Show mode line tooltips only if the corresponding action applies.
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Customize the option 'mode-line-default-help-echo' to restore the old
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behavior where the tooltip text is also shown when the corresponding
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action does not apply.
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+++
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** New hook 'server-after-make-frame-hook'.
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This hook is a convenient place to perform initializations in daemon
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mode which require GUI features to be available. One example is
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restoration of the previous session using the desktop.el package: put
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the call to 'desktop-read' in this hook, if you want the GUI settings
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to be restored, or if desktop.el needs to interact with you during
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restoration of the session.
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+++
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** New function 'logcount' calculates an integer's Hamming weight.
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+++
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** New function 'libxml-available-p'.
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This function returns non-nil if libxml support is both compiled in
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and available at run time. Lisp programs should use this function to
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detect built-in libxml support, instead of testing for that
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indirectly, e.g., by checking that functions like
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'libxml-parse-html-region' return nil.
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+++
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** 'libxml-parse-xml-region' and 'libxml-parse-html-region' take
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a parameter that's called DISCARD-COMMENTS, but it really only
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discards the top-level comment. Therefore this parameter is now
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obsolete, and the new utility function 'xml-remove-comments' can be
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used to remove comments before calling the libxml functions to parse
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the data.
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+++
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** The Network Security Manager now allows more fine-grained control
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of what checks to run via the 'network-security-protocol-checks'
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variable.
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+++
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** TLS connections have their security tightened by default.
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Most of the checks for outdated, believed-to-be-weak TLS algorithms
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and ciphers are now switched on by default. By default, the NSM will
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flag connections using these weak algorithms and ask users whether to
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allow them. To get the old behavior back (where certificates are
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checked for validity, but no warnings about weak cryptography are
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issued), you can either set 'network-security-protocol-checks' to nil,
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or adjust the elements in that variable to only happen on the 'high'
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security level (assuming you use the 'medium' level).
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+++
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** Native GnuTLS connections can now use client certificates.
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Previously, this support was only available when using the external
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'gnutls-cli' command. Call 'open-network-stream' with
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':client-certificate t' to trigger looking up of per-server
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certificates via 'auth-source'.
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+++
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** New function 'fill-polish-nobreak-p', to be used in 'fill-nobreak-predicate'.
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It blocks line breaking after a one-letter word, also in the case when
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this word is preceded by a non-space, but non-alphanumeric character.
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+++
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** The limit on repetitions in regexps has been raised to 2^16-1.
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It was previously limited to 2^15-1. For example, the following
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regular expression was previously invalid, but is now accepted:
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x\{32768\}
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---
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** The German prefix and postfix input methods now support Capital sharp S.
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---
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** New input methods 'hawaiian-postfix' and 'hawaiian-prefix'.
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---
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** New input methods for several variants of the Sami language.
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The Sami input methods include: 'norwegian-sami-prefix',
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'bergsland-hasselbrink-sami-prefix', 'southern-sami-prefix',
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'ume-sami-prefix', 'northern-sami-prefix', 'inari-sami-prefix',
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'skolt-sami-prefix', and 'kildin-sami-prefix'.
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+++
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** In Japanese environments that do not specify encodings and are not
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based on MS-Windows, the default encoding is now utf-8 instead of
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japanese-iso-8bit.
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+++
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** New function 'exec-path'.
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This function by default returns the value of the corresponding
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variable, but can optionally return the equivalent of 'exec-path'
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from a remote host.
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+++
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** The function 'executable-find' supports an optional argument REMOTE.
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This triggers to search the program on the remote host as indicated by
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'default-directory'.
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+++
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** New variable 'auto-save-no-message'.
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When set to t, no message will be shown when auto-saving (default
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value: nil).
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---
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** The value of 'make-cursor-line-fully-visible' can now be a function.
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In addition to nil or non-nil, the value can now be a predicate
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function. Follow mode uses this to control scrolling of its windows
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when the last screen line in a window is not fully visible.
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+++
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** New variable 'emacs-repository-branch'.
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It reports the git branch from which Emacs was built.
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+++
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** New user option 'switch-to-buffer-obey-display-actions'.
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When non-nil, 'switch-to-buffer' uses 'pop-to-buffer-same-window' that
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respects display actions specified by 'display-buffer-alist' and
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'display-buffer-overriding-action'.
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** New 'flex' completion style
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An implementation of popular "flx/fuzzy/scatter" completion which
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matches strings where the pattern appears as a subsequence. Put
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simply, makes "foo" complete to both "barfoo" and "frodo". Add 'flex'
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to 'completion-styles' or 'completion-category-overrides' to use it.
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** Connection-local variables
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+++
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*** Connection-local variables are applied by default like file-local
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and directory-local variables.
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+++
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*** The macro 'with-connection-local-variables' has been renamed from
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'with-connection-local-profiles'. No argument PROFILES needed any longer.
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---
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** New variable 'next-error-verbose' controls when 'next-error' outputs
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a message about the error locus.
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---
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** New variable 'grep-search-path' defines the directories searched for
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grep hits (this used to be controlled by 'compilation-search-path').
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---
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** New variable 'emacs-lisp-compilation-search-path' defines the
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directories searched for byte-compiler error messages (this used to
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be controlled by 'compilation-search-path').
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|
||
** Multicolor fonts such as "Noto Color Emoji" can be displayed on
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Emacs configured with Cairo drawing and linked with cairo >= 1.16.0.
|
||
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+++
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** Emacs now optionally displays a fill column indicator.
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This is similar to what 'fill-column-indicator' package provides, but
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much faster and compatible with 'show-trailing-whitespace'.
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Customize the buffer-local variables 'display-fill-column-indicator'
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and 'display-fill-column-indicator-character' to activate the
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indicator.
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The indicator is not displayed at all in minibuffer windows and
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in tooltips, as it is not useful there.
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||
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||
There are 2 new buffer local variables and 1 face to customize this
|
||
mode they are described in the manual "(emacs) Display".
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||
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||
+++
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||
** 'progress-reporter-update' accepts a suffix string to display.
|
||
|
||
|
||
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* Editing Changes in Emacs 27.1
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||
+++
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||
** New command 'make-empty-file'.
|
||
|
||
---
|
||
** New variable 'x-wait-for-event-timeout'.
|
||
This controls how long Emacs will wait for updates to the graphical
|
||
state to take effect (making a frame visible, for example).
|
||
|
||
+++
|
||
** New user option 'electric-quote-replace-double'.
|
||
This option controls whether '"' is replaced in 'electric-quote-mode',
|
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in addition to other quote characters. If non-nil, ASCII double-quote
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characters that quote text "like this" are replaced by double
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||
typographic quotes, “like this”, in text modes, and in comments in
|
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non-text modes.
|
||
|
||
---
|
||
** New user option 'flyspell-case-fold-duplications'.
|
||
This option controls whether Flyspell mode considers consecutive words
|
||
to be duplicates if they are not in the same case. If non-nil, the
|
||
default, words are considered to be duplicates even if their letters'
|
||
case does not match.
|
||
|
||
---
|
||
** 'write-abbrev-file' now includes special properties.
|
||
'write-abbrev-file' now writes special properties like ':case-fixed'
|
||
for abbrevs that have them.
|
||
|
||
+++
|
||
** 'write-abbrev-file' skips empty tables.
|
||
'write-abbrev-file' now skips inserting a 'define-abbrev-table' form for
|
||
tables which do not have any non-system abbrevs to save.
|
||
|
||
+++
|
||
** The new functions and commands 'text-property-search-forward' and
|
||
'text-property-search-backward' have been added. These provide an
|
||
interface that's more like functions like 'search-forward'.
|
||
|
||
---
|
||
** More commands support noncontiguous rectangular regions, namely
|
||
'upcase-dwim', 'downcase-dwim', 'replace-string', 'replace-regexp',
|
||
and 'delimit-columns-region'.
|
||
|
||
+++
|
||
** When asked to visit a large file, Emacs now offers visiting it literally.
|
||
Previously, Emacs would only ask for confirmation before visiting
|
||
large files. Now it also offers a third alternative: to visit the
|
||
file literally, as in 'find-file-literally', which speeds up
|
||
navigation and editing of large files.
|
||
|
||
---
|
||
** 'add-dir-local-variable' now uses dotted pair notation syntax to
|
||
write alists of variables to ".dir-locals.el". This is the same
|
||
syntax that you can see in the example of a ".dir-locals.el" file in
|
||
the node "(emacs) Directory Variables" of the user manual.
|
||
|
||
+++
|
||
** Network connections using 'local' can now use IPv6.
|
||
'make-network-process' now uses the correct loopback address when
|
||
asked to use ':host 'local' and ':family 'ipv6'.
|
||
|
||
+++
|
||
** The new function 'replace-region-contents' replaces the current
|
||
region using a given replacement-function in a non-destructive manner
|
||
(in terms of 'replace-buffer-contents').
|
||
|
||
+++
|
||
** The command 'replace-buffer-contents' now has two optional
|
||
arguments mitigating performance issues when operating on huge
|
||
buffers.
|
||
|
||
+++
|
||
** The command 'delete-indentation' now operates on the active region.
|
||
If the region is active, the command joins all the lines in the
|
||
region. When there's no active region, the command works on the
|
||
current and the previous or the next line, as before.
|
||
|
||
|
||
* Changes in Specialized Modes and Packages in Emacs 27.1
|
||
|
||
+++
|
||
** winner
|
||
*** A new variable, `winner-boring-buffers-regexp', has been added.
|
||
|
||
** table
|
||
** `table-generate-source' and friends now support outputting wiki and
|
||
mediawiki format tables.
|
||
|
||
---
|
||
** telnet-mode
|
||
*** Reverting a buffer in `telnet-mode' will restart a closed
|
||
connection.
|
||
|
||
** goto-addr
|
||
*** A way to more conveniently specify what URI address schemes that
|
||
should be ignored have been added via the
|
||
`goto-address-uri-schemes-ignored' variable.
|
||
|
||
+++
|
||
** tex-mode
|
||
*** 'latex-noindent-commands' controls indentation of certain commands.
|
||
You can use this new variable to control indentation of arguments of
|
||
\emph, \footnote, and similar commands.
|
||
|
||
** byte compiler
|
||
*** byte-compile-dynamic is now obsolete
|
||
This is because on the one hand it suffers from various misbehaviors in corner
|
||
cases that have plagued it for years, and on the other experiments indicated
|
||
that it doesn't bring any measurable benefit.
|
||
|
||
** compile.el
|
||
---
|
||
*** In 'compilation-error-regexp-alist', 'line' (and 'end-line') can
|
||
be functions.
|
||
|
||
** cl-lib.el
|
||
+++
|
||
*** 'cl-defstruct' has a new ':noinline' argument to prevent inlining
|
||
its functions.
|
||
|
||
** doc-view.el
|
||
*** New commands 'doc-view-presentation' and 'doc-view-fit-window-to-page'.
|
||
*** Added support for password-protected PDF files
|
||
|
||
** Ido
|
||
*** New user option 'ido-big-directories' to mark directories whose
|
||
names match certain regular expressions as big. Ido won't attempt to
|
||
list the contents of such directories when completing file names.
|
||
|
||
** Minibuffer
|
||
|
||
---
|
||
*** Minibuffer now uses 'minibuffer-message' to display error messages
|
||
at the end of the active minibuffer.
|
||
|
||
** map.el
|
||
*** Now also understands plists.
|
||
*** Now defined via generic functions that can be extended via 'cl-defmethod'.
|
||
*** Deprecate the 'map-put' macro in favor of a new 'map-put!' function.
|
||
*** 'map-contains-key' now returns a boolean rather than the key.
|
||
*** Deprecate the 'testfn' args of 'map-elt' and 'map-contains-key'.
|
||
*** New generic function 'map-insert'.
|
||
|
||
+++
|
||
** seq.el
|
||
New convenience functions 'seq-first' and 'seq-rest' give easy access
|
||
to respectively the first and all but the first elements of sequences.
|
||
|
||
The new predicate function 'seq-contains-p' should be used instead of
|
||
the now obsolete 'seq-contains'.
|
||
|
||
---
|
||
** Follow mode
|
||
In the current follow group of windows, "ghost" cursors are no longer
|
||
displayed in the non-selected follow windows. To get the old behavior
|
||
back, customize 'follow-hide-ghost-cursors' to nil.
|
||
|
||
+++
|
||
** New variable 'warning-fill-column' for 'display-warning'.
|
||
|
||
** Windmove
|
||
|
||
*** 'windmove-create-window' when non-nil makes a new window on moving off
|
||
the edge of the frame.
|
||
|
||
*** Windmove supports directional window display and selection.
|
||
The new command 'windmove-display-default-keybindings' binds default
|
||
keys with provided modifiers (by default, Shift-Meta) to the commands
|
||
that display the next buffer in the window at the specified direction.
|
||
This is like 'windmove-default-keybindings' that binds keys to commands
|
||
that select the window in the specified direction, but additionally it
|
||
displays the buffer from the next command in that window. For example,
|
||
'S-M-right C-h i' displays the "*Info*" buffer in the right window,
|
||
creating the window if necessary. A special key can be customized to
|
||
display the buffer in the same window, for example, 'S-M-0 C-h e'
|
||
displays the "*Messages*" buffer in the same window.
|
||
|
||
*** Windmove also supports directional window deletion.
|
||
The new command 'windmove-delete-default-keybindings' binds default
|
||
keys with provided prefix (by default, 'C-x') and modifiers (by default,
|
||
'Shift') to the commands that delete the window in the specified
|
||
direction. For example, 'C-x S-down' deletes the window below.
|
||
With a prefix arg 'C-u', also kills the buffer in that window.
|
||
With 'M-0', deletes the selected window and selects the window
|
||
that was in the specified direction.
|
||
|
||
*** New command 'windmove-swap-states-in-direction' binds default keys
|
||
to the commands that swap the states of the selected window with the
|
||
window in the specified direction.
|
||
|
||
** Octave mode
|
||
The mode is automatically enabled in files that start with the
|
||
'function' keyword.
|
||
|
||
** project.el
|
||
|
||
*** New commands 'project-search' and 'project-query-replace-regexp'.
|
||
|
||
*** New customizable variable 'project-read-file-name-function'.
|
||
|
||
** Etags
|
||
|
||
+++
|
||
*** 'next-file' is now an obsolete alias of 'tags-next-file'.
|
||
|
||
*** 'tags-loop-revert-buffers' is an obsolete alias of
|
||
'fileloop-revert-buffers'.
|
||
|
||
*** The 'tags-loop-continue' function along with the
|
||
'tags-loop-operate' and 'tags-loop-scan' variables are now obsolete;
|
||
use the new 'fileloop-initialize' and 'fileloop-continue' functions
|
||
instead.
|
||
|
||
+++
|
||
*** etags is now able to read Zstandard-compressed files.
|
||
|
||
** bibtex
|
||
|
||
---
|
||
*** New commands 'bibtex-next-entry' and 'bibtex-previous-entry'.
|
||
In 'bibtex-mode-map', 'forward-paragraph' and 'backward-paragraph' are
|
||
remapped to these, respectively.
|
||
|
||
** Dired
|
||
|
||
+++
|
||
*** New command 'dired-create-empty-file'.
|
||
|
||
+++
|
||
*** New command and keystroke `dired-number-of-marked-files' bound to
|
||
`* N'.
|
||
|
||
*** The marking commands now report how many files were marked by the
|
||
command itself, not how many files are marked in total.
|
||
|
||
** Find-Dired
|
||
|
||
*** New customizable variable 'find-dired-refine-function'.
|
||
The default value is 'find-dired-sort-by-filename'.
|
||
|
||
*** New sorting options for the variable 'find-ls-option'.
|
||
|
||
---
|
||
*** Zstandard compression is now supported for 'dired-do-compress' and
|
||
'dired-do-compress-to'.
|
||
|
||
** Change Logs and VC
|
||
|
||
*** Recording ChangeLog entries doesn't require an actual file.
|
||
If a ChangeLog file doesn't exist, and if the new variable
|
||
'add-log-dont-create-changelog-file' is non-nil (which is the
|
||
default), commands such as 'C-x 4 a' will add log entries to a
|
||
suitable named temporary buffer. (An existing ChangeLog file will
|
||
still be used if it exists.) Set the variable to nil to get the
|
||
previous behavior of always creating a buffer that visits a ChangeLog
|
||
file.
|
||
|
||
*** New customizable variable 'vc-find-revision-no-save'.
|
||
With non-nil, 'vc-find-revision' doesn't write the created buffer to file.
|
||
|
||
*** New customizable variable 'vc-git-grep-template'.
|
||
This new variable allows customizing the default arguments passed to
|
||
'git-grep' when 'vc-git-grep' is used.
|
||
|
||
*** Command 'vc-git-stash' now respects marks in the "*vc-dir*" buffer.
|
||
When some files are marked, only those are stashed.
|
||
When no files are marked, all modified files are stashed, as before.
|
||
|
||
*** The new hook 'vc-retrieve-tag-hook' runs after retrieving a tag.
|
||
|
||
---
|
||
*** 'vc-hg' now invokes 'smerge-mode' when visiting files.
|
||
Code that attempted to invoke 'smerge-mode' when visiting an Hg file
|
||
with conflicts existed in earlier versions of Emacs, but incorrectly
|
||
never detected a conflict due to invalid assumptions about cached
|
||
values.
|
||
|
||
+++
|
||
*** 'C-u C-x v D' ('vc-root-version-diff') prompts for two revisions
|
||
and compares their entire trees.
|
||
|
||
*** New user option 'vc-hg-revert-switches' specifies switches to pass
|
||
to Hg revert.
|
||
|
||
*** 'C-x v M D' ('vc-diff-mergebase') and 'C-x v M L' ('vc-log-mergebase')
|
||
print diffs and logs between the merge base (common ancestor) of two
|
||
given revisions.
|
||
|
||
** Diff mode
|
||
+++
|
||
*** Hunks are now automatically refined by font-lock.
|
||
To disable refinement, set the new user option 'diff-refine' to nil.
|
||
To get back the old behavior where hunks are refined as you navigate
|
||
through a diff, set 'diff-refine' to the symbol 'navigate'.
|
||
|
||
+++
|
||
*** 'diff-auto-refine-mode' is deprecated in favor of 'diff-refine'.
|
||
It is no longer enabled by default and binding it no longer has any
|
||
effect.
|
||
|
||
+++
|
||
*** Better syntax highlighting of Diff hunks.
|
||
Fragments of source in Diff hunks are now by default highlighted
|
||
according to the appropriate major mode. Customize the new option
|
||
'diff-font-lock-syntax' to nil to disable this.
|
||
|
||
*** File headers can be shortened, mimicking Magit's diff format.
|
||
To enable it, set the new user option 'diff-font-lock-prettify' to t.
|
||
|
||
+++
|
||
*** Prefix arg of 'diff-goto-source' means jump to the old revision
|
||
of the file under version control if point is on an old changed line,
|
||
or to the new revision of the file otherwise.
|
||
|
||
** Texinfo
|
||
|
||
+++
|
||
*** New function for inserting '@pxref', '@xref', or '@ref' commands.
|
||
The function 'texinfo-insert-dwim-@ref', bound to 'C-c C-c r' by
|
||
default, inserts one of three types of references based on the text
|
||
surrounding point, namely '@pxref' near a parenthesis, '@xref' at the
|
||
start of a sentence or at '(point-min)', else '@ref'.
|
||
|
||
** Browse-url
|
||
|
||
*** The function 'browse-url-emacs' can now visit a URL in selected window.
|
||
It now treats the optional 2nd argument to mean that the URL should be
|
||
shown in the currently selected window.
|
||
|
||
** Comint
|
||
|
||
+++
|
||
*** 'send-invisible' is now an obsolete alias for 'comint-send-invisible'.
|
||
Also, 'shell-strip-ctrl-m' is declared obsolete.
|
||
|
||
+++
|
||
*** 'C-c .' ('comint-insert-previous-argument') no longer interprets '&'.
|
||
This feature caused problems when '&&' was present in the previous
|
||
command. Since this command emulates 'M-.' in Bash and zsh, neither
|
||
of which treats '&' specially, the feature was removed for
|
||
compatibility with these shells.
|
||
|
||
+++
|
||
*** 'comint-insert-previous-argument' can now count arguments from the end.
|
||
By default, invoking 'C-c .' with a numeric argument N would copy the
|
||
Nth argument, counting from the first one. But if the new option
|
||
'comint-insert-previous-argument-from-end' is non-nil, it will copy
|
||
the Nth argument counting from the last one. Thus 'C-c .' can now
|
||
better emulate 'M-.' in both Bash and zsh, since the former counts
|
||
from the beginning of the arguments, while the latter counts from the
|
||
end.
|
||
|
||
** SQL
|
||
|
||
*** SQL Indent Minor Mode
|
||
SQL Mode now supports the ELPA 'sql-indent' package for assisting
|
||
sophisticated SQL indenting rules. Note, however, that SQL is not
|
||
like other programming languages like C, Java, or Python where code is
|
||
sparse and rules for formatting are fairly well established. Instead
|
||
SQL is more like COBOL (from which it came) and code tends to be very
|
||
dense and line ending decisions driven by syntax and line length
|
||
considerations to make readable code. Experienced SQL developers may
|
||
prefer to rely upon existing Emacs facilities for formatting code but
|
||
the 'sql-indent' package provides facilities to aid more casual SQL
|
||
developers layout queries and complex expressions.
|
||
|
||
**** 'sql-use-indent-support' (default t) enables SQL indention support.
|
||
The 'sql-indent' package from ELPA must be installed to get the
|
||
indentation support in 'sql-mode' and 'sql-interactive-mode'.
|
||
|
||
**** 'sql-mode-hook' and 'sql-interactive-mode-hook' changed.
|
||
Both hook variables have had 'sql-indent-enable' added to their
|
||
default values. If you have existing customizations to these variables,
|
||
you should make sure that the new default entry is included.
|
||
|
||
*** Connection Wallet
|
||
Database passwords can now by stored in NETRC or JSON data files that
|
||
may optionally be encrypted. When establishing an interactive session
|
||
with the database via 'sql-connect' or a product specific function,
|
||
like 'sql-mysql' or 'my-postgres', the password wallet will be
|
||
searched for the password. The 'sql-product', 'sql-server',
|
||
'sql-database', and the 'sql-username' will be used to identify the
|
||
appropriate authorization. This eliminates the discouraged practice of
|
||
embedding database passwords in your Emacs initialization.
|
||
|
||
See the 'auth-source' module for complete documentation on the file
|
||
formats. By default, the wallet file is expected to be in the
|
||
'user-emacs-directory', named 'sql-wallet' or '.sql-wallet', with
|
||
'.json' (JSON) or no (NETRC) suffix. Both file formats can optionally
|
||
be encrypted with GPG by adding an additional '.gpg' suffix.
|
||
|
||
** Term
|
||
|
||
---
|
||
*** 'term-read-noecho' is now obsolete, use 'read-passwd' instead.
|
||
|
||
** Flymake
|
||
|
||
+++
|
||
*** The variable 'flymake-diagnostic-types-alist' is obsolete.
|
||
You should instead set properties on known diagnostic symbols, like
|
||
':error' and ':warning', as demonstrated in the Flymake manual.
|
||
|
||
*** New customizable variable 'flymake-start-on-save-buffer'.
|
||
Control whether Flymake starts checking the buffer on save.
|
||
|
||
*** Flymake and backend functions may exchange hints about buffer changes.
|
||
This enables more efficient backends. See the docstring of
|
||
'flymake-diagnostic-functions' or the Flymake manual for details.
|
||
|
||
+++
|
||
*** 'flymake-start-syntax-check-on-newline' is now obsolete,
|
||
use 'post-self-insert-hook' to check on newline.
|
||
|
||
** Ruby
|
||
|
||
*** The Rubocop Flymake diagnostic function will only run Lint cops if
|
||
it can't find the config file.
|
||
|
||
*** Rubocop is called with 'bundle exec' if Gemfile mentions it.
|
||
|
||
*** New command 'ruby-find-library-file' bound to 'C-c C-f'.
|
||
|
||
** Package
|
||
|
||
*** Change of 'package-check-signature' for packages with multiple sigs
|
||
In previous Emacsen, 't' checked that all signatures are valid.
|
||
Now 't' only checks that at least one signature is valid and the new 'all'
|
||
value needs to be used if you want to enforce that all signatures
|
||
are valid. This only affects packages with multiple signatures.
|
||
|
||
*** New function 'package-get-version' lets packages query their own version.
|
||
Example use in auctex.el: '(defconst auctex-version (package-get-version))'
|
||
|
||
*** New 'package-quickstart' feature.
|
||
When 'package-quickstart' is non-nil, package.el precomputes a big
|
||
autoloads file so that activation of packages can be done much faster,
|
||
which can speed up your startup significantly.
|
||
It also causes variables like 'package-user-dir' and
|
||
'package-load-list' to be consulted when 'package-quickstart-refresh'
|
||
is run rather than at startup so you don't need to set them in your
|
||
early init file.
|
||
|
||
*** New function 'package-activate-all'.
|
||
|
||
---
|
||
*** Imenu support has been added to `package-menu-mode'.
|
||
|
||
** Info
|
||
|
||
---
|
||
*** Info can now follow 'file://' protocol URLs.
|
||
The 'file://' URLs in Info documents can now be followed by passing
|
||
them to the 'browse-url' function, like the other protocols: ftp,
|
||
http, and https. This allows to have references to local HTML files,
|
||
for example.
|
||
|
||
** Xref
|
||
|
||
+++
|
||
*** New command 'xref-find-definitions-at-mouse'.
|
||
This command finds definitions of the identifier at the place of a
|
||
mouse click event, and is intended to be bound to a mouse event.
|
||
|
||
+++
|
||
*** Changing 'xref-marker-ring-length' works after 'xref.el' is loaded.
|
||
Previously, setting 'xref-marker-ring-length' would only take effect
|
||
if set before 'xref.el' was loaded.
|
||
|
||
---
|
||
*** 'xref-find-definitions' now sets the mark at the buffer position
|
||
where it was invoked.
|
||
|
||
---
|
||
*** New xref faces 'xref-file-header', 'xref-line-number', 'xref-match'.
|
||
|
||
*** New variable 'xref-show-definitions-function'.
|
||
It encapsulates the logic pertinent to showing the result of
|
||
'xref-find-definitions'. The user can change it to customize its
|
||
behavior and the display of results.
|
||
|
||
*** Search results show the buffer even for one hit.
|
||
The search-type Xref commands (e.g. 'xref-find-references' or
|
||
'project-find-regexp') now show the results buffer even when there is
|
||
only one hit. This can be altered by changing
|
||
'xref-show-xrefs-function'.
|
||
|
||
*** Xref buffers support refreshing the search results.
|
||
A new command 'xref-revert-buffer' is bound to 'g'.
|
||
|
||
** Ecomplete
|
||
|
||
*** The ecomplete sorting has changed to a decay-based algorithm.
|
||
This can be controlled by the new 'ecomplete-sort-predicate' variable.
|
||
|
||
*** The 'ecompleterc' file is now placed in '~/.emacs.d/ecompleterc' by default.
|
||
Of course it will still find it if you have it in '~/.ecompleterc'.
|
||
|
||
** Gnus
|
||
|
||
---
|
||
*** Gnus now maps imaps to 993 only on old MS-Windows versions.
|
||
The nnimap backend used to do this unconditionally to work around
|
||
problems on old versions of MS-Windows. This is now done only for
|
||
Windows XP and older.
|
||
|
||
+++
|
||
*** The nnimap backend now has support for IMAP namespaces.
|
||
This feature can be enabled by setting the new 'nnimap-use-namespaces'
|
||
server variable to non-nil.
|
||
|
||
+++
|
||
*** A prefix argument to 'gnus-summary-limit-to-score' will limit reverse.
|
||
Limit to articles with score at below.
|
||
|
||
*** The function 'gnus-score-find-favorite-words' has been renamed
|
||
from 'gnus-score-find-favourite-words'.
|
||
|
||
---
|
||
*** Gmane has been removed as an nnir backend, since Gmane no longer
|
||
has a search engine.
|
||
|
||
+++
|
||
*** Splitting mail on common mailing list headers has been added.
|
||
See the concept index in the Gnus manual for the 'match-list' entry.
|
||
|
||
+++
|
||
*** nil is no longer an allowed value for 'mm-text-html-renderer'.
|
||
|
||
+++
|
||
*** A new Gnus summary mode command, 'S A'
|
||
('gnus-summary-attach-article') can be used to attach the current
|
||
article(s) to a pre-existing Message buffer, or create a new Message
|
||
buffer with the article(s) attached.
|
||
|
||
+++
|
||
*** A new Gnus summary mode command, 'w'
|
||
('gnus-summary-browse-url') scans the article buffer for URLs, and
|
||
offers them to the user to open with 'browse-url'.
|
||
|
||
---
|
||
*** New option 'nnir-notmuch-filter-group-names-function'.
|
||
This option controls whether and how to use Gnus search groups as
|
||
'path:' search terms to 'notmuch'.
|
||
|
||
** erc
|
||
|
||
---
|
||
*** 'erc-button-google-url' has been renamed to 'erc-button-search-url'
|
||
and its value has been changed to Duck Duck Go.
|
||
|
||
---
|
||
*** `erc-send-pre-hook' and `erc-send-this' have been obsoleted. The
|
||
variable to use instead to alter text to be sent is now
|
||
`erc-pre-send-functions'.
|
||
|
||
** EUDC
|
||
|
||
*** XEmacs support has been removed.
|
||
|
||
** eww/shr
|
||
|
||
+++
|
||
*** The 'eww' command can now create a new EWW buffer.
|
||
Invoking the command with a prefix argument will cause it to create a
|
||
new EWW buffer for the URL instead of reusing the default one.
|
||
|
||
+++
|
||
*** The 'd' ('eww-download') command now falls back to current page's URL.
|
||
If this command is invoked with no URL at point, it now downloads the
|
||
current page instead of signaling an error.
|
||
|
||
*** When opening external links in eww/shr (typically with the
|
||
'C-u RET' keystroke on a link), the link will be flashed with the new
|
||
'shr-selected-link' face to give the user feedback that the command
|
||
has been executed.
|
||
|
||
+++
|
||
*** New option 'shr-discard-aria-hidden'.
|
||
If set, shr will not render tags with attribute 'aria-hidden="true"'.
|
||
This attribute is meant to tell screen readers to ignore a tag.
|
||
|
||
---
|
||
*** 'shr-tag-ol' now respects the ordered list 'start' attribute.
|
||
|
||
---
|
||
*** The following tags are now handled: <code>, <abbr>, and <acronym>.
|
||
|
||
** Htmlfontify
|
||
|
||
*** The functions 'hfy-color', 'hfy-color-vals' and
|
||
'hfy-fallback-color-values' and the variables 'hfy-fallback-color-map'
|
||
and 'hfy-rgb-txt-color-map' have been renamed from names that used
|
||
'colour' instead of 'color'.
|
||
|
||
+++
|
||
** Enriched mode supports the 'charset' text property.
|
||
You can add or modify the 'charset' text properties of text using the
|
||
'Edit->Text Properties->Special Properties' menu, or by invoking the
|
||
'facemenu-set-charset' command. Documents in Enriched mode will be
|
||
saved with the charset properties, and those properties will be
|
||
restored when the file is visited.
|
||
|
||
** Smtpmail
|
||
|
||
Authentication mechanisms can be added via external packages, by
|
||
defining new 'cl-defmethod' of 'smtpmail-try-auth-method'.
|
||
|
||
** Footnote mode
|
||
|
||
*** Support Hebrew-style footnotes
|
||
*** Footnote text lines are now aligned.
|
||
Can be controlled via the new variable 'footnote-align-to-fn-text'.
|
||
|
||
** CSS mode
|
||
|
||
---
|
||
*** A new command 'css-cycle-color-format' for cycling between color
|
||
formats (e.g. "black" => "#000000" => "rgb(0, 0, 0)") has been added,
|
||
bound to 'C-c C-f'.
|
||
|
||
---
|
||
*** CSS mode, SCSS mode, and Less CSS mode now have support for Imenu.
|
||
|
||
** SGML mode
|
||
|
||
---
|
||
*** 'sgml-quote' now handles double quotes and apostrophes
|
||
when escaping text and in addition all numeric entities when
|
||
unescaping text.
|
||
|
||
** Python mode
|
||
|
||
---
|
||
*** Python mode supports three different font lock decoration levels.
|
||
The maximum level is used by default; customize
|
||
'font-lock-maximum-decoration' to tone down the decoration.
|
||
|
||
** Dired
|
||
|
||
+++
|
||
*** The new user option 'dired-create-destination-dirs' controls whether
|
||
'dired-do-copy' and 'dired-rename-file' should create non-existent
|
||
directories in the destination.
|
||
|
||
** Help
|
||
|
||
---
|
||
*** Description of variables and functions give an estimated first release.
|
||
|
||
---
|
||
*** Output format of 'C-h l' ('view-lossage') has changed.
|
||
For convenience, 'view-lossage' now displays the last keystrokes
|
||
and commands in the same format as the edit buffer of
|
||
'edit-last-kbd-macro'. This makes it possible to copy the lines from
|
||
the buffer generated by 'view-lossage' to the "*Edit Macro*" buffer
|
||
created by 'edit-last-kbd-macro', and to save the macro by 'C-c C-c'.
|
||
|
||
---
|
||
*** The list of help commands produced by 'C-h C-h' ('help-for-help')
|
||
can now be searched via 'C-s'.
|
||
|
||
** Ibuffer
|
||
|
||
---
|
||
*** New filter 'ibuffer-filter-by-process'; bound to '/E'.
|
||
|
||
---
|
||
*** All mode filters can now accept a list of symbols.
|
||
This means you can now easily filter several major modes, as well
|
||
as a single mode.
|
||
|
||
** Search and Replace
|
||
|
||
*** Isearch supports a prefix argument for 'C-s' ('isearch-repeat-forward')
|
||
and 'C-r' ('isearch-repeat-backward'). With a prefix argument, these
|
||
commands repeat the search for the specified occurrence of the search string.
|
||
A negative argument repeats the search in the opposite direction.
|
||
This makes possible also to use a prefix argument for 'M-s .'
|
||
('isearch-forward-symbol-at-point') to find the next Nth symbol.
|
||
|
||
*** To go to the first/last occurrence of the current search string
|
||
is possible now with new commands 'isearch-beginning-of-buffer' and
|
||
'isearch-end-of-buffer' bound to 'M-s M-<' and 'M-s M->' in Isearch.
|
||
With a numeric argument, they go to the Nth absolute occurrence
|
||
counting from the beginning/end of the buffer. This complements
|
||
'C-s'/'C-r' that searches for the next Nth relative occurrence
|
||
with a numeric argument.
|
||
|
||
*** 'isearch-lazy-count' shows the current match number and total number
|
||
of matches in the Isearch prompt. Customizable variables
|
||
'lazy-count-prefix-format' and 'lazy-count-suffix-format' define the
|
||
format of the current and the total number of matches in the prompt's
|
||
prefix and suffix respectively.
|
||
|
||
*** 'lazy-highlight-buffer' highlights matches in the full buffer.
|
||
It is useful in combination with 'lazy-highlight-cleanup' customized to nil
|
||
to leave matches highlighted in the whole buffer after exiting isearch.
|
||
Also when 'lazy-highlight-buffer' prepares highlighting in the buffer,
|
||
navigation through the matches without flickering is more smooth.
|
||
'lazy-highlight-buffer-max-at-a-time' controls the number of matches to
|
||
highlight in one iteration while processing the full buffer.
|
||
|
||
+++
|
||
*** New isearch bindings.
|
||
|
||
'C-M-w' in isearch changed from 'isearch-del-char' to the new function
|
||
'isearch-yank-symbol-or-char'. 'isearch-del-char' is now bound to
|
||
'C-M-d'.
|
||
|
||
+++
|
||
*** New variable 'isearch-yank-on-move' provides options 't' and 'shift'
|
||
to extend the search string by yanking text that ends at the new
|
||
position after moving point in the current buffer. 'shift' extends
|
||
the search string by motion commands while holding down the shift key.
|
||
|
||
*** 'isearch-allow-scroll' provides new option 'unlimited' to allow
|
||
scrolling any distance off screen.
|
||
|
||
---
|
||
*** Isearch now remembers the regexp-based search mode for words/symbols
|
||
and case-sensitivity together with search strings in the search ring.
|
||
|
||
---
|
||
*** Isearch now has its own tool-bar and menu-bar menu.
|
||
|
||
+++
|
||
*** 'flush-lines' prints and returns the number of deleted matching lines.
|
||
|
||
** Debugger
|
||
|
||
+++
|
||
*** The Lisp Debugger is now based on 'backtrace-mode'.
|
||
Backtrace mode adds fontification and commands for changing the
|
||
appearance of backtrace frames. See the node "(elisp) Backtraces" in
|
||
the Elisp manual for documentation of the new mode and its commands.
|
||
|
||
** Edebug
|
||
|
||
+++
|
||
*** The runtime behavior of Edebug's instrumentation can be changed
|
||
using the new variables 'edebug-behavior-alist',
|
||
'edebug-after-instrumentation-function' and
|
||
'edebug-new-definition-function'. Edebug's behavior can be changed
|
||
globally or for individual definitions.
|
||
|
||
+++
|
||
*** Edebug's backtrace buffer now uses 'backtrace-mode'.
|
||
Backtrace mode adds fontification, links and commands for changing the
|
||
appearance of backtrace frames. See the node "(elisp) Backtraces" in
|
||
the Elisp manual for documentation of the new mode and its commands.
|
||
|
||
The binding of 'd' in Edebug's keymap is now 'edebug-pop-to-backtrace'
|
||
which replaces 'edebug-backtrace'. Consequently Edebug's backtrace
|
||
windows now behave like those of the Lisp Debugger and of ERT, in that
|
||
when they appear they will be the selected window.
|
||
|
||
The new 'backtrace-goto-source' command, bound to 's', works in
|
||
Edebug's backtraces on backtrace frames whose source code has
|
||
been instrumented by Edebug.
|
||
|
||
** Enhanced xterm support
|
||
|
||
*** New variable 'xterm-set-window-title' controls whether Emacs sets
|
||
the XTerm window title. This feature is experimental and is disabled
|
||
by default.
|
||
|
||
** Grep
|
||
|
||
+++
|
||
*** 'rgrep', 'lgrep' and 'zrgrep' now hide part of the command line
|
||
that contains a list of ignored directories and files.
|
||
Clicking on the button with ellipsis unhides it.
|
||
The abbreviation can be disabled by the new option
|
||
'grep-find-abbreviate'. The new command
|
||
'grep-find-toggle-abbreviation' toggles it interactively.
|
||
|
||
*** 'grep-find-use-xargs' is now customizable with sorting options.
|
||
|
||
** ERT
|
||
|
||
+++
|
||
*** New variable 'ert-quiet' allows to make ERT output in batch mode
|
||
less verbose by removing non-essential information.
|
||
|
||
+++
|
||
*** ERT's backtrace buffer now uses 'backtrace-mode'.
|
||
Backtrace mode adds fontification and commands for changing the
|
||
appearance of backtrace frames. See the node "(elisp) Backtraces" in
|
||
the Elisp manual for documentation of the new mode and its commands.
|
||
|
||
** Gamegrid
|
||
|
||
---
|
||
*** Gamegrid now determines its default glyph size based on display
|
||
dimensions, instead of always using 16 pixels. As a result, Tetris,
|
||
Snake and Pong are more playable on HiDPI displays.
|
||
|
||
** Filecache
|
||
|
||
---
|
||
*** Completing filenames in the minibuffer via 'C-TAB' now uses the
|
||
styles as configured by the variable 'completion-styles'.
|
||
|
||
** New macros 'thunk-let' and 'thunk-let*'.
|
||
These macros are analogue to 'let' and 'let*', but create bindings that
|
||
are evaluated lazily.
|
||
|
||
** next-error
|
||
|
||
+++
|
||
*** New customizable variable 'next-error-find-buffer-function'.
|
||
The value should be a function that determines how to find the
|
||
next buffer to be used by 'next-error' and 'previous-error'. The
|
||
default is to use the last buffer that navigated to the current
|
||
error.
|
||
|
||
+++
|
||
*** New command 'next-error-select-buffer'.
|
||
It can be used to set any buffer as the next one to be used by
|
||
'next-error' and 'previous-error'.
|
||
|
||
** nxml-mode
|
||
|
||
---
|
||
*** The default value of 'nxml-sexp-element-flag' is now t.
|
||
This means that pressing 'C-M-SPACE' now selects the entire tree by
|
||
default, and not just the opening element.
|
||
|
||
** Eshell
|
||
|
||
*** TAB completion uses the standard 'completion-at-point' rather than
|
||
'pcomplete'. Its UI is slightly different but can be customized to
|
||
behave similarly, e.g. Pcomplete's default cycling can be obtained
|
||
with '(setq completion-cycle-threshold 5)'.
|
||
|
||
---
|
||
*** Expansion of history event designators is disabled by default.
|
||
To restore the old behavior, use
|
||
|
||
(add-hook 'eshell-expand-input-functions
|
||
#'eshell-expand-history-references)
|
||
|
||
---
|
||
*** The function 'eshell-uniquify-list' has been renamed from
|
||
'eshell-uniqify-list'.
|
||
|
||
*** The function 'eshell/kill' is now able to handle signal switches.
|
||
Previously 'eshell/kill' would fail if provided a kill signal to send
|
||
to the process. It now accepts signals specified either by name or by
|
||
its number.
|
||
|
||
---
|
||
*** Emacs now follows symlinks in history-related files.
|
||
The files specified by 'eshell-history-file-name' and
|
||
'eshell-last-dir-ring-file-name' can include symlinks; these are now
|
||
followed when Emacs writes the relevant history variables to the disk.
|
||
|
||
** Shell
|
||
|
||
---
|
||
*** Program name completion inside remote shells works now as expected.
|
||
|
||
+++
|
||
*** The variable 'shell-file-name' can be set now as connection-local
|
||
variable for remote shells. It still defaults to "/bin/sh".
|
||
|
||
** Single shell commands
|
||
|
||
+++
|
||
*** 'async-shell-command-width' defines the number of display columns
|
||
available for output of asynchronous shell commands.
|
||
|
||
** Pcomplete
|
||
|
||
*** The function 'pcomplete-uniquify-list' has been renamed from
|
||
'pcomplete-uniqify-list'.
|
||
|
||
** Auth-source
|
||
|
||
---
|
||
*** The Secret Service backend supports the ':create' key now.
|
||
|
||
** Tramp
|
||
|
||
+++
|
||
*** New connection method "nextcloud", which allows to access OwnCloud
|
||
or NextCloud hosted files and directories.
|
||
|
||
+++
|
||
*** New connection method "rclone", which allows to access system
|
||
storages via the 'rclone' program. This feature is experimental.
|
||
|
||
+++
|
||
*** New connection method "sudoedit", which allows to edit local files
|
||
with different user credentials. Contrary to the "sudo" method, no
|
||
session is run permanently in the background. This is for security
|
||
reasons.
|
||
|
||
+++
|
||
*** Connection methods "obex" and "synce" are removed, because they
|
||
are obsoleted in GVFS.
|
||
|
||
+++
|
||
*** Validated passwords are saved by auth-source backends which support this.
|
||
|
||
+++
|
||
*** During user and host name completion in the minibuffer, results
|
||
from auth-source search are taken into account. This can be disabled
|
||
by setting the user option 'tramp-completion-use-auth-sources' to nil.
|
||
|
||
+++
|
||
*** The user option 'tramp-ignored-file-name-regexp' allows to disable
|
||
Tramp for some look-alike remote file names.
|
||
|
||
+++
|
||
*** For some connection methods, like "su" or "sudo", the host name in
|
||
ad-hoc multi-hop file names must match the previous hop. Default host
|
||
names are adjusted to the host name from the previous hop.
|
||
|
||
+++
|
||
*** For the connection methods "sudo" and "doas" there exists a
|
||
timeout, after which the underlying session is disabled. This is for
|
||
security reasons.
|
||
|
||
** Rcirc
|
||
|
||
---
|
||
*** New user option 'rcirc-url-max-length'.
|
||
Setting this option to an integer causes URLs displayed in Rcirc
|
||
buffers to be truncated to that many characters.
|
||
|
||
---
|
||
*** The default /quit and /part reasons are now configurable.
|
||
Two new user options are provided for this:
|
||
'rcirc-default-part-reason' and 'rcirc-default-quit-reason'.
|
||
|
||
** Register
|
||
|
||
---
|
||
*** The return value of method 'register-val-describe' includes the
|
||
names of buffers shown by the windows of a window configuration.
|
||
|
||
---
|
||
** The options.el library has been removed.
|
||
It was obsolete since Emacs 22.1, replaced by customize.
|
||
|
||
** The tls.el and starttls.el libraries are now marked obsolete.
|
||
Use of built-in libgnutls based functionality (described in the Emacs
|
||
GnuTLS manual) is recommended instead.
|
||
|
||
** Message
|
||
|
||
+++
|
||
*** Messages can now be systematically encrypted
|
||
when the PGP keyring contains a public key for every recipient. To
|
||
achieve this, add 'message-sign-encrypt-if-all-keys-available' to
|
||
'message-send-hook'.
|
||
|
||
---
|
||
*** When replying a message that have addresses on the form
|
||
'"foo@bar.com" <foo@bar.com>', Message will elide the repeated "name"
|
||
from the address field in the response.
|
||
|
||
---
|
||
*** The default of 'message-forward-as-mime' has changed from t to nil
|
||
as it has been reported that many recipients can't read forwards that
|
||
are formatted as MIME digests.
|
||
|
||
+++
|
||
*** 'message-forward-included-headers' has changed its default to
|
||
exclude most headers when forwarding.
|
||
|
||
** EasyPG
|
||
|
||
---
|
||
*** 'epa-pinentry-mode' is renamed to 'epg-pinentry-mode'.
|
||
It now applies to epg functions as well as epa functions.
|
||
|
||
---
|
||
*** The alias functions 'epa--encode-coding-string',
|
||
'epa--decode-coding-string', and 'epa--select-safe-coding-system' have
|
||
been removed. Use 'encode-coding-string', 'decode-coding-string', and
|
||
'select-safe-coding-system' instead.
|
||
|
||
** Rmail
|
||
|
||
+++
|
||
*** New user option 'rmail-output-reset-deleted-flag'.
|
||
If this option is non-nil, messages appended to an output file by the
|
||
'rmail-output' command have their Deleted flag reset.
|
||
|
||
*** The command 'rmail-summary-by-senders' with an empty argument
|
||
selects the messages to summarize with a regexp that matches the
|
||
sender of the current message.
|
||
|
||
** Threads
|
||
|
||
+++
|
||
*** New variable 'main-thread' holds Emacs's main thread.
|
||
This is handy in Lisp programs that run on a non-main thread and want
|
||
to signal the main thread, e.g., when they encounter an error.
|
||
|
||
+++
|
||
*** 'thread-join' returns the result of the finished thread now.
|
||
|
||
+++
|
||
*** 'thread-signal' does not propagate errors to the main thread.
|
||
Instead, error messages are just printed in the main thread.
|
||
|
||
---
|
||
*** 'thread-alive-p' is now obsolete, use 'thread-live-p' instead.
|
||
|
||
+++
|
||
*** New command 'list-threads' shows Lisp threads.
|
||
See the current list of live threads in a tabulated-list buffer which
|
||
automatically updates. In the buffer, you can use 's q' or 's e' to
|
||
signal a thread with quit or error respectively, or get a snapshot
|
||
backtrace with 'b'.
|
||
|
||
|
||
** thingatpt.el
|
||
|
||
---
|
||
*** 'thing-at-point' supports a new "thing" called 'uuid'.
|
||
A symbol 'uuid' can be passed to 'thing-at-point' and it returns the
|
||
UUID at point.
|
||
|
||
---
|
||
*** 'word-at-point' and 'sentence-at-point' accept NO-PROPERTIES.
|
||
Just like 'thing-at-point' itself.
|
||
|
||
** Interactive automatic highlighting
|
||
|
||
+++
|
||
*** 'highlight-regexp' can now highlight subexpressions.
|
||
The new command accepts a prefix numeric argument to choose the
|
||
subexpression.
|
||
|
||
** Mouse display of minor mode menu
|
||
|
||
---
|
||
*** 'minor-mode-menu-from-indicator' now displays full minor mode name.
|
||
When there is no menu for a mode, display the mode name after the
|
||
indicator instead of just the indicator (which is sometimes cryptic).
|
||
|
||
** rx
|
||
|
||
---
|
||
*** rx now handles raw bytes in character alternatives correctly,
|
||
when given in a string. Previously, '(any "\x80-\xff")' would match
|
||
characters U+0080...U+00FF. Now the expression matches raw bytes in
|
||
the 128...255 range, as expected.
|
||
|
||
---
|
||
*** The rx 'or' and 'seq' forms no longer require any arguments.
|
||
(or) produces a regexp that never matches anything, while (seq)
|
||
matches the empty string, each being an identity for the operation.
|
||
This also works for their aliases: '|' for 'or'; ':', 'and' and
|
||
'sequence' for 'seq'.
|
||
|
||
---
|
||
*** 'regexp' and new 'literal' accept arbitrary lisp as arguments.
|
||
In this case, 'rx' will generate code which produces a regexp string
|
||
at run time, instead of a constant string.
|
||
|
||
** Frames
|
||
|
||
+++
|
||
*** New command 'make-frame-on-monitor' makes a frame on the specified monitor.
|
||
|
||
+++
|
||
*** New value of 'minibuffer' frame parameter 'child-frame'.
|
||
This allows to create and parent immediately a minibuffer-only child
|
||
frame when making a frame.
|
||
|
||
---
|
||
*** New predicates 'display-blink-cursor-p' and 'display-symbol-keys-p'.
|
||
These predicates are to be preferred over 'display-graphic-p' when
|
||
testing for blinking cursor capability and the capability to have
|
||
symbols (e.g., '[return]', '[tab]', '[backspace]') as keys respectively.
|
||
|
||
** Tabulated List mode
|
||
|
||
+++
|
||
*** New user options for tabulated list sort indicators.
|
||
You can now customize which sorting indicator character to display
|
||
near the current column in Tabulated Lists (see variables
|
||
'tabulated-list-gui-sort-indicator-asc',
|
||
'tabulated-list-gui-sort-indicator-desc',
|
||
'tabulated-list-tty-sort-indicator-asc', and
|
||
'tabulated-list-tty-sort-indicator-desc').
|
||
|
||
+++
|
||
*** Two new commands and keystrokes have been added to the tabulated
|
||
list mode: `w' (which widens the current column) and `c' which makes
|
||
the current column contract.
|
||
|
||
** Text mode
|
||
|
||
+++
|
||
*** 'text-mode-variant' is now obsolete, use 'derived-mode-p' instead.
|
||
|
||
** CUA mode
|
||
|
||
---
|
||
*** New user option 'cua-rectangle-terminal-modifier-key'.
|
||
This user option allows for the customization of the modifier key used
|
||
in a terminal frame.
|
||
|
||
** JS mode
|
||
|
||
---
|
||
*** JSX syntax is now automatically detected and enabled.
|
||
If a file imports Facebook's 'React' library, or if the file uses the
|
||
extension '.jsx', then various features supporting XML-like syntax
|
||
will be supported in 'js-mode' and derivative modes. ('js-jsx-mode'
|
||
no longer needs to be enabled.)
|
||
|
||
---
|
||
*** New user option 'js-jsx-detect-syntax' disables automatic detection.
|
||
This is turned on by default.
|
||
|
||
---
|
||
*** New user option 'js-jsx-syntax' enables JSX syntax unconditionally.
|
||
This is off by default.
|
||
|
||
---
|
||
*** New variable 'js-jsx-regexps' controls JSX detection.
|
||
|
||
---
|
||
*** JSX syntax is now highlighted like SGML.
|
||
|
||
---
|
||
*** JSX code is properly indented in many more scenarios.
|
||
Previously, JSX indentation usually only worked when an element was
|
||
wrapped in parenthesis (e.g. in a 'return' statement or a function
|
||
call). It would also fail in many intricate cases. Now, indentation
|
||
should work anywhere without parenthesis; many more intricacies are
|
||
supported; and, indentation conventions align more closely with those
|
||
of the React developer community (see 'js-jsx-align->-with-<'),
|
||
otherwise still adhering to SGML conventions.
|
||
|
||
---
|
||
*** New user option 'js-jsx-align->-with-<' controls '>' indents.
|
||
Commonly in JSX code, a '>' on its own line is indented at the same
|
||
level as its opening '<'. This is the new default for JSX. This
|
||
behavior is slightly different than that used by SGML in Emacs, where
|
||
'>' is indented at the same level as attributes, which was also the
|
||
old default for JSX.
|
||
|
||
This is turned on by default. To get back the old default indentation
|
||
behavior of aligning '>' with attributes, set 'js-jsx-align->-with-<'
|
||
to nil.
|
||
|
||
---
|
||
*** Indentation uses 'js-indent-level' instead of 'sgml-basic-offset'.
|
||
Since JSX is a syntax extension of JavaScript, it makes the most sense
|
||
for JSX expressions to be indented the same number of spaces as other
|
||
JS expressions. This is a breaking change, but it probably aligns
|
||
with how you'd expect this indentation to behave. If you want JSX to
|
||
be indented like JS, you won't need to change your config.
|
||
|
||
The old behavior can be emulated by controlling JSX indentation
|
||
independently of JS, by setting 'js-jsx-indent-level'.
|
||
|
||
---
|
||
*** New user option 'js-jsx-indent-level' for different JSX indentation.
|
||
If you wish to indent JSX by a different number of spaces than JS, set
|
||
this user option to the desired number.
|
||
|
||
---
|
||
*** New user option 'js-jsx-attribute-offset' for JSX attribute indents.
|
||
|
||
---
|
||
*** New variable 'js-syntactic-mode-name' controls mode name display.
|
||
Previously, the mode name was simply 'JavaScript'. Now, when a syntax
|
||
extension like JSX is enabled, the mode name is 'JavaScript[JSX]'.
|
||
Set this variable to nil to disable the new behavior.
|
||
|
||
---
|
||
*** New function 'js-use-syntactic-mode-name' for deriving modes.
|
||
Packages deriving from 'js-mode' with 'define-derived-mode' should
|
||
call this function to add enabled syntax extensions to their mode
|
||
name, too.
|
||
|
||
** Autorevert
|
||
|
||
*** New variable 'auto-revert-avoid-polling' for saving power.
|
||
When set to a non-nil value, buffers in Auto Revert mode are no longer
|
||
polled for changes periodically. This reduces the power consumption
|
||
of an idle Emacs, but may fail on some network file systems; set
|
||
'auto-revert-notify-exclude-dir-regexp' to match files where
|
||
notification is not supported. The default value is nil.
|
||
|
||
*** New variable 'buffer-auto-revert-by-notification'
|
||
A major mode can declare that notification on the buffer's default
|
||
directory is sufficient to know when updates are required, by setting
|
||
the new variable 'buffer-auto-revert-by-notification' to a non-nil
|
||
value. Auto Revert mode can use this information to avoid polling the
|
||
buffer periodically when 'auto-revert-avoid-polling' is non-nil.
|
||
|
||
** auth-source-pass
|
||
|
||
+++
|
||
*** New customizable variable 'auth-source-pass-filename'.
|
||
Allows setting the path to the password-store, defaults to
|
||
~/.password-store.
|
||
|
||
+++
|
||
*** New customizable variable 'auth-source-pass-port-separator'.
|
||
Specifies separator between host and port, defaults to colon ":".
|
||
|
||
---
|
||
*** Minimize the number of decryptions during password lookup.
|
||
This makes the package usable with physical tokens requiring touching
|
||
a sensor for every decryption.
|
||
|
||
---
|
||
*** 'auth-source-pass-get' is now autoloaded.
|
||
|
||
** Bookmarks
|
||
|
||
---
|
||
*** 'bookmark-file' and 'bookmark-old-default-file' are now obsolete
|
||
aliases of 'bookmark-default-file'.
|
||
|
||
*** New user option 'bookmark-watch-bookmark-file'.
|
||
When non-nil, watch whether the bookmark file has changed on disk.
|
||
|
||
---
|
||
** The mantemp.el library is now marked obsolete.
|
||
This library generates manual C++ template instantiations. It should
|
||
no longer be useful on modern compilers, which do this automatically.
|
||
|
||
** Ispell
|
||
|
||
---
|
||
*** New hook 'ispell-change-dictionary-hook'.
|
||
This runs after changing the dictionary and could be used to
|
||
automatically spellcheck a buffer when changing language without
|
||
needing to advice 'ispell-change-dictionary'.
|
||
|
||
|
||
* New Modes and Packages in Emacs 27.1
|
||
|
||
** fileloop.el lets one setup multifile operations like search&replace.
|
||
|
||
+++
|
||
** Emacs can now visit files in archives as if they were directories.
|
||
This feature uses Tramp and works only on systems which support GVFS,
|
||
i.e. GNU/Linux, roughly spoken. See the node "(tramp) Archive file
|
||
names" in the Tramp manual for full documentation of these facilities.
|
||
|
||
+++
|
||
** New library for writing JSONRPC applications (https://jsonrpc.org).
|
||
The 'jsonrpc' library enables writing Emacs Lisp applications that
|
||
rely on this protocol. Since the protocol is designed to be
|
||
transport-agnostic, the library provides an API to implement new
|
||
transport strategies as well as a separate API to use them. A
|
||
transport implementation for process-based communication, such as is
|
||
used by the Language Server Protocol (LSP), is readily available.
|
||
|
||
+++
|
||
** Backtrace mode improves viewing of Elisp backtraces.
|
||
Backtrace mode adds pretty printing, fontification and ellipsis
|
||
expansion to backtrace buffers produced by the Lisp debugger, Edebug
|
||
and ERT. See the node "(elisp) Backtraces" in the Elisp manual for
|
||
documentation of the new mode and its commands.
|
||
|
||
|
||
* Incompatible Lisp Changes in Emacs 27.1
|
||
|
||
+++
|
||
** add-hook does not always add to the front or the end any more.
|
||
The replacement of `append` with `depth` implies that the function is not
|
||
always added to the very front (when append/depth is nil) or the very end (when
|
||
append/depth is t) any more because other functions on the hook may have
|
||
specified higher/lower depths.
|
||
|
||
** In 'compilation-error-regexp-alist' the old undocumented feature
|
||
where 'line' could be a function of 2 arguments has been dropped.
|
||
|
||
** 'define-fringe-bitmap' is always defined, even when Emacs is built
|
||
without any GUI support.
|
||
|
||
---
|
||
** Just loading a theme's file no longer activates the theme's settings.
|
||
Loading a theme with 'M-x load-theme' still activates the theme, as it
|
||
did before. However, loading the theme's file with 'M-x load-file',
|
||
or using 'require' or 'load' in a Lisp program, doesn't actually apply
|
||
the theme's settings until you either invoke 'M-x enable-theme' or
|
||
type 'M-x load-theme'. (In a Lisp program, calling 'enable-theme' or
|
||
invoking 'load-theme' with NO-ENABLE argument omitted or nil has the
|
||
same effect of activating a theme whose file has been loaded.) The
|
||
special case of the 'user' theme is an exception: it is frequently
|
||
used for ad-hoc customizations, so the settings of that theme are by
|
||
default applied immediately.
|
||
|
||
The variable 'custom--inhibit-theme-enable' controls this behavior;
|
||
its default value changed in Emacs 27.1.
|
||
|
||
** The REPETITIONS argument of 'benchmark-run' can now also be a variable.
|
||
|
||
** Interpretation of relative 'HOME' directory has changed.
|
||
If "$HOME" is set to a relative file name, 'expand-file-name' now
|
||
interprets it relative to the directory where Emacs was started, not
|
||
relative to the 'default-directory' of the current buffer. We recommend
|
||
always setting "$HOME" to an absolute file name, so that its meaning is
|
||
independent of where Emacs was started.
|
||
|
||
** The FILENAME argument to 'file-name-base' is now mandatory and no
|
||
longer defaults to 'buffer-file-name'.
|
||
|
||
---
|
||
** The function 'eldoc-message' now accepts a single argument.
|
||
Programs that called it with multiple arguments before should pass
|
||
them through 'format' first. Even that is discouraged: for ElDoc
|
||
support, you should set 'eldoc-documentation-function' instead of
|
||
calling 'eldoc-message' directly.
|
||
|
||
** Old-style backquotes now generate an error.
|
||
They have been generating warnings for a decade. To interpret
|
||
old-style backquotes as new-style, bind the new variable
|
||
'force-new-style-backquotes' to t.
|
||
|
||
** Defining a Common Lisp structure using 'cl-defstruct' or
|
||
'cl-struct-define' whose name clashes with a builtin type (e.g.,
|
||
'integer' or 'hash-table') now signals an error.
|
||
|
||
** When formatting a floating-point number as an octal or hexadecimal
|
||
integer, Emacs now signals an error if the number is too large for the
|
||
implementation to format.
|
||
|
||
** 'logb' now returns infinity when given an infinite or zero argument,
|
||
and returns a NaN when given a NaN. Formerly, it returned an extreme
|
||
fixnum for such arguments.
|
||
|
||
---
|
||
** Some functions and variables obsolete since Emacs 22 have been removed:
|
||
archive-mouse-extract, assoc-ignore-case, assoc-ignore-representation,
|
||
backward-text-line, blink-cursor, bookmark-exit-hooks,
|
||
c-opt-op-identitier-prefix, comint-use-prompt-regexp-instead-of-fields,
|
||
compilation-finish-function, count-text-lines, cperl-vc-header-alist,
|
||
custom-face-save-command, cvs-display-full-path, cvs-fileinfo->full-path,
|
||
delete-frame-hook, derived-mode-class, describe-char-after, describe-project,
|
||
desktop-basefilename, desktop-buffer-handlers, desktop-buffer-misc-functions,
|
||
desktop-buffer-modes-to-save, desktop-enable, desktop-load-default,
|
||
dired-omit-files-p, disabled-command-hook, dungeon-mode-map,
|
||
electric-nroff-mode, electric-nroff-newline, electric-perl-terminator,
|
||
focus-frame, forward-text-line, generic-define-mswindows-modes,
|
||
generic-define-unix-modes, generic-font-lock-defaults, goto-address-at-mouse,
|
||
highlight-changes-colours, ibuffer-elide-long-columns, ibuffer-hooks,
|
||
ibuffer-mode-hooks, icalendar-convert-diary-to-ical,
|
||
icalendar-extract-ical-from-buffer, imenu-always-use-completion-buffer-p,
|
||
ipconfig-program, ipconfig-program-options, isearch-lazy-highlight-cleanup,
|
||
isearch-lazy-highlight-initial-delay, isearch-lazy-highlight-interval,
|
||
isearch-lazy-highlight-max-at-a-time, iswitchb-use-fonts,
|
||
latin1-char-displayable-p, mouse-wheel-click-button, mouse-wheel-down-button,
|
||
mouse-wheel-up-button, new-frame, pascal-outline, process-kill-without-query,
|
||
recentf-menu-append-commands-p, rmail-pop-password,
|
||
rmail-pop-password-required, savehist-load, set-default-font,
|
||
spam-list-of-processors, speedbar-add-ignored-path-regexp,
|
||
speedbar-buffers-line-path, speedbar-ignored-path-expressions,
|
||
speedbar-ignored-path-regexp, speedbar-line-path, speedbar-path-line,
|
||
timer-set-time-with-usecs, tooltip-gud-display, tooltip-gud-modes,
|
||
tooltip-gud-toggle-dereference, unfocus-frame, unload-hook-features-list,
|
||
update-autoloads-from-directories, vc-comment-ring, vc-comment-ring-index,
|
||
vc-comment-search-forward, vc-comment-search-reverse, vc-comment-to-change-log,
|
||
vc-diff-switches-list, vc-next-comment, vc-previous-comment, view-todo,
|
||
x-lost-selection-hooks, x-sent-selection-hooks.
|
||
|
||
---
|
||
** Further functions and variables obsolete since Emacs 24 have been removed:
|
||
default-directory-alist, dired-default-directory,
|
||
dired-default-directory-alist, dired-enable-local-variables,
|
||
dired-hack-local-variables, dired-local-variables-file, dired-omit-here-always.
|
||
|
||
** Garbage collection no longer treats miscellaneous objects specially;
|
||
they are now allocated like any other pseudovector. As a result, the
|
||
'garbage-collect' and 'memory-use-count' functions no longer return a
|
||
'misc' component, and the 'misc-objects-consed' variable has been
|
||
removed.
|
||
|
||
+++
|
||
** Reversed character ranges are no longer permitted in 'rx'.
|
||
Previously, ranges where the starting character is greater than the
|
||
ending character were silently omitted.
|
||
For example, '(rx (any "@z-a" (?9 . ?0)))' would match '@' only.
|
||
Now, such 'rx' expressions generate an error.
|
||
|
||
+++
|
||
** 'text-mode' no longer sets the value of 'indent-line-function'.
|
||
The global value of 'indent-line-function', which defaults to
|
||
'indent-relative', will no longer be reset locally when turning on
|
||
'text-mode'.
|
||
|
||
To get back the old behavior, add a function to 'text-mode-hook' which
|
||
performs '(setq-local indent-line-function #'indent-relative)'.
|
||
|
||
** 'make-process' no longer accepts a non-nil ':stop' key. This has
|
||
never worked reliably, and now causes an error.
|
||
|
||
+++
|
||
** 'eventp' no longer returns non-nil for lists whose car is nil.
|
||
This is consistent with the fact that nil, though a symbol, is not a
|
||
valid event type.
|
||
|
||
|
||
* Lisp Changes in Emacs 27.1
|
||
|
||
** defcustom now takes a :local keyword that can be either t or
|
||
`permanent', which mean that the variable should be automatically
|
||
buffer-local. `permanent' also sets the variable's
|
||
`permanent-local' property.
|
||
|
||
+++
|
||
** The new macro `with-suppressed-warnings' can be used to suppress
|
||
specific byte-compile warnings.
|
||
|
||
---
|
||
** The new function `byte-compile-info-message' can be used to output
|
||
informational messages that look pleasing during the Emacs build.
|
||
|
||
+++
|
||
** The 'append' arg of 'add-hook' is generalized to a finer notion of 'depth'
|
||
This makes it possible to control the ordering of functions more precisely,
|
||
as was already possible in 'add-function' and `advice-add`.
|
||
|
||
---
|
||
** New 'help-fns-describe-variable-functions' hook.
|
||
Makes it possible to add metadata information to 'describe-variable'.
|
||
|
||
** i18n (internationalization)
|
||
|
||
*** ngettext can be used now to return the right plural form
|
||
according to the given numeric value.
|
||
|
||
+++
|
||
** 'inhibit-null-byte-detection' is renamed to 'inhibit-nul-byte-detection'.
|
||
|
||
+++
|
||
** 'self-insert-command' takes the char to insert as (optional) argument.
|
||
|
||
** 'lookup-key' can take a list of keymaps as argument.
|
||
|
||
+++
|
||
** 'condition-case' now accepts 't' to match any error symbol.
|
||
|
||
+++
|
||
** New function 'proper-list-p'.
|
||
Given a proper list as argument, this predicate returns its length;
|
||
otherwise, it returns nil. 'format-proper-list-p' is now an obsolete
|
||
alias for the new function.
|
||
|
||
+++
|
||
** Emacs Lisp integers can now be of arbitrary size.
|
||
Emacs uses the GNU Multiple Precision (GMP) library to support
|
||
integers whose size is too large to support natively. The integers
|
||
supported natively are known as "fixnums", while the larger ones are
|
||
"bignums". The new predicates 'bignump' and 'fixnump' can be used to
|
||
distinguish between these two types of integers.
|
||
|
||
All the arithmetic, comparison, and logical (a.k.a. "bitwise")
|
||
operations where bignums make sense now support both fixnums and
|
||
bignums. However, note that unlike fixnums, bignums will not compare
|
||
equal with 'eq', you must use 'eql' instead. (Numerical comparison
|
||
with '=' works on both, of course.)
|
||
|
||
Since large bignums consume a lot of memory, Emacs limits the size of
|
||
the largest bignum a Lisp program is allowed to create. The
|
||
nonnegative value of the new variable 'integer-width' specifies the
|
||
maximum number of bits allowed in a bignum. Emacs signals an integer
|
||
overflow error if this limit is exceeded.
|
||
|
||
Several primitive functions formerly returned floats or lists of
|
||
integers to represent integers that did not fit into fixnums. These
|
||
functions now simply return integers instead. Affected functions
|
||
include functions like 'encode-char' that compute code-points, functions
|
||
like 'file-attributes' that compute file sizes and other attributes,
|
||
functions like 'process-id' that compute process IDs, and functions like
|
||
'user-uid' and 'group-gid' that compute user and group IDs.
|
||
|
||
** Time values
|
||
|
||
+++
|
||
*** Although the default timestamp format is still '(HI LO US PS)',
|
||
it is planned to change in a future Emacs version, to exploit bignums.
|
||
The documentation has been updated to mention that the timestamp
|
||
format may change and that programs should use functions like
|
||
'format-time-string', 'decode-time', and 'encode-time' rather than
|
||
probing the innards of a timestamp directly, or creating a timestamp
|
||
by hand.
|
||
|
||
+++
|
||
*** 'encode-time' supports a new API '(encode-time TIME &optional FORM)'.
|
||
This can convert decoded times and Lisp time values to Lisp timestamps
|
||
of various forms, including a new timestamp form '(TICKS . HZ)', where
|
||
TICKS is an integer and HZ is a positive integer denoting a clock
|
||
frequency. The old 'encode-time' API is still supported.
|
||
|
||
+++
|
||
*** 'time-add', 'time-subtract', and 'time-less-p' now accept
|
||
infinities and NaNs too, and propagate them or return nil like
|
||
floating-point operators do.
|
||
|
||
+++
|
||
*** New function 'time-equal-p' compares time values for equality.
|
||
|
||
+++
|
||
*** 'format-time-string' supports a new conversion specifier flag '+'
|
||
that acts like the '0' flag but also puts a '+' before nonnegative
|
||
years containing more than four digits. This is for compatibility
|
||
with POSIX.1-2017.
|
||
|
||
** 'define-minor-mode' automatically documents the meaning of ARG.
|
||
|
||
+++
|
||
** The function 'recenter' now accepts an additional optional argument.
|
||
By default, calling 'recenter' will not redraw the frame even if
|
||
'recenter-redisplay' is non-nil. Call 'recenter' with the new second
|
||
argument non-nil to force redisplay per 'recenter-redisplay's value.
|
||
|
||
+++
|
||
** New functions 'major-mode-suspend' and 'major-mode-restore'.
|
||
Use them when switching temporarily to another major mode, e.g. for
|
||
'hexl-mode', or to switch between 'c-mode' and 'image-mode' in XPM.
|
||
|
||
+++
|
||
** New macro 'dolist-with-progress-reporter'.
|
||
This works like 'dolist', but reports progress similar to
|
||
'dotimes-with-progress-reporter'.
|
||
|
||
+++
|
||
** New hook 'after-delete-frame-functions'.
|
||
This works like 'delete-frame-functions', but runs after the frame to
|
||
be deleted has been made dead and removed from the frame list.
|
||
|
||
---
|
||
** The function 'provided-mode-derived-p' was extended to support aliases.
|
||
The function now returns non-nil when the argument MODE is derived
|
||
from any alias of any of MODES.
|
||
|
||
+++
|
||
** New frame focus state inspection interface.
|
||
The hooks 'focus-in-hook' and 'focus-out-hook' are now obsolete.
|
||
Instead, attach to 'after-focus-change-function' using 'add-function'
|
||
and inspect the focus state of each frame using 'frame-focus-state'.
|
||
|
||
+++
|
||
** Emacs now requests and recognizes focus-change notifications from TTYs.
|
||
On terminal emulators that support the feature, Emacs can now support
|
||
'focus-in-hook' and 'focus-out-hook' for TTY frames.
|
||
|
||
+++
|
||
** Window-specific face remapping.
|
||
Face specifications (of the kind used in 'face-remapping-alist')
|
||
now support filters, allowing faces to vary between different windows
|
||
displaying the same buffer. See the node "(elisp) Face Remapping"
|
||
of the Emacs Lisp Reference manual for more detail.
|
||
|
||
+++
|
||
** Window change functions have been redesigned.
|
||
Hooks reacting to window changes run now only when redisplay detects
|
||
that a change has actually occurred. Six hooks are now provided:
|
||
'window-buffer-change-functions' (run after window buffers have
|
||
changed), 'window-size-change-functions' (run after a window was
|
||
assigned a new buffer or size), 'window-configuration-change-hook'
|
||
(like the former but run also when a window was deleted),
|
||
'window-selection-change-functions' (run when the selected window
|
||
changed) and 'window-state-change-functions' and
|
||
'window-state-change-hook' (run when any of the preceding ones is
|
||
run). Applications can enforce running the latter two using the new
|
||
function 'set-frame-window-state-change'. 'window-scroll-functions'
|
||
are unaffected by these changes.
|
||
|
||
In addition, a number of functions now allow the caller to detect what
|
||
has changed since last redisplay: 'window-old-buffer' returns for any
|
||
window the buffer it showed at that time. ‘old-selected-window’ and
|
||
'old-selected-frame' return the window and frame that were selected
|
||
during last redisplay. 'window-old-pixel-width' (renamed from
|
||
'window-pixel-width-before-size-change'), 'window-old-pixel-height'
|
||
(renamed from 'window-pixel-height-before-size-change'),
|
||
'window-old-body-pixel-width' and 'window-old-body-pixel-height'
|
||
return the total and body sizes of any window during last redisplay.
|
||
|
||
See the section "(elisp) Window Hooks" in the Elisp manual for a
|
||
detailed explanation of the new behavior.
|
||
|
||
+++
|
||
** New option 'resize-mini-frames'.
|
||
This option allows to automatically resize minibuffer-only frames
|
||
similarly to how minibuffer windows are resized on "normal" frames.
|
||
|
||
+++
|
||
** New buffer display action function 'display-buffer-in-direction'.
|
||
This function allows to specify the location of the window chosen by
|
||
'display-buffer' in various ways.
|
||
|
||
+++
|
||
** New buffer display action alist entry 'dedicated'.
|
||
Such an entry allows to specify the dedicated status of a window
|
||
created by 'display-buffer'.
|
||
|
||
+++
|
||
** New buffer display action alist entry 'window-min-height'.
|
||
Such an entry allows to specify a minimum height of the window used
|
||
for displaying a buffer. 'display-buffer-below-selected' is the only
|
||
action function to respect it at the moment.
|
||
|
||
+++
|
||
** New buffer display action alist entry 'direction'.
|
||
This entry is used to specify the location of the window chosen by
|
||
'display-buffer-in-direction'.
|
||
|
||
+++
|
||
** Additional meaning of display action alist entry 'window'.
|
||
A 'window' entry can now also specify a reference window for
|
||
'display-buffer-in-direction'.
|
||
|
||
+++
|
||
** The function 'assoc-delete-all' now takes an optional predicate argument.
|
||
|
||
+++
|
||
** New function 'string-distance' to calculate the Levenshtein distance
|
||
between two strings.
|
||
|
||
** 'print-quoted' now defaults to t, so if you want to see
|
||
'(quote x)' instead of 'x you will have to bind it to nil where applicable.
|
||
|
||
+++
|
||
** Numbers formatted via '%o' or '%x' are now formatted as signed integers.
|
||
This avoids problems in calls like '(read (format "#x%x" -1))', and is
|
||
more compatible with bignums. To get the traditional machine-dependent
|
||
behavior, set the experimental variable 'binary-as-unsigned' to t,
|
||
and if the new behavior breaks your code please email
|
||
<32252@debbugs.gnu.org>. Because '%o' and '%x' can now format signed
|
||
integers, they now support the '+' and space flags.
|
||
|
||
** To avoid confusion caused by "smart quotes", the reader signals an
|
||
error when reading Lisp symbols which begin with one of the following
|
||
quotation characters: ‘’‛“”‟〞＂＇. A symbol beginning with such a
|
||
character can be written by escaping the quotation character with a
|
||
backslash. For example:
|
||
|
||
(read "‘smart") => (invalid-read-syntax "strange quote" "‘")
|
||
(read "\\‘smart") == (intern "‘smart")
|
||
|
||
+++
|
||
** Omitting variables after '&optional' and '&rest' is now allowed.
|
||
For example '(defun foo (&optional))' is no longer an error. This is
|
||
sometimes convenient when writing macros. See the ChangeLog entry
|
||
titled "Allow '&rest' or '&optional' without following variable
|
||
(Bug#29165)" for a full listing of which arglists are accepted across
|
||
versions.
|
||
|
||
** Internal parsing commands now use 'syntax-ppss' and disregard
|
||
'open-paren-in-column-0-is-defun-start'. This affects mostly things like
|
||
'forward-comment', 'scan-sexps', and 'forward-sexp' when parsing backward.
|
||
The new variable 'comment-use-syntax-ppss' can be set to nil to recover
|
||
the old behavior if needed.
|
||
|
||
** The 'server-name' and 'server-socket-dir' variables are set when a
|
||
socket has been passed to Emacs.
|
||
|
||
---
|
||
** The 'file-system-info' function is now available on all platforms.
|
||
instead of just Microsoft platforms. This fixes a 'get-free-disk-space'
|
||
bug on OS X 10.8 and later.
|
||
|
||
---
|
||
** The function 'get-free-disk-space' returns now a non-nil value for
|
||
remote systems, which support this check.
|
||
|
||
+++
|
||
** 'memory-limit' now returns a better estimate of memory consumption.
|
||
|
||
+++
|
||
** New macro 'combine-change-calls' arranges to call the change hooks
|
||
('before-change-functions' and 'after-change-functions') just once
|
||
each around a sequence of lisp forms, given a region. This is
|
||
useful when a function makes a possibly large number of repetitive
|
||
changes and the change hooks are time consuming.
|
||
|
||
+++
|
||
** 'eql', 'make-hash-table', etc. now treat NaNs consistently.
|
||
Formerly, some of these functions ignored signs and significands of
|
||
NaNs. Now, all these functions treat NaN signs and significands as
|
||
significant. For example, '(eql 0.0e+NaN -0.0e+NaN)' now returns nil
|
||
because the two NaNs have different signs; formerly it returned t.
|
||
Also, Emacs now reads and prints NaN significands; e.g., if X is a
|
||
NaN, '(format "%s" X)' now returns "0.0e+NaN", "1.0e+NaN", etc.,
|
||
depending on X's significand.
|
||
|
||
+++
|
||
** The function 'make-string' accepts an additional optional argument.
|
||
If the optional third argument is non-nil, 'make-string' will produce
|
||
a multibyte string even if its second argument is an ASCII character.
|
||
|
||
** '(format "%d" X)' no longer mishandles a floating-point number X that
|
||
does not fit in a machine integer.
|
||
|
||
---
|
||
** New coding-system 'ibm038'.
|
||
This is the International EBCDIC encoding, also available as aliases
|
||
'ebcdic-int' and 'cp038'.
|
||
|
||
+++
|
||
** In the DST slot, 'encode-time' and 'parse-time-string' now return -1
|
||
if it is not known whether daylight saving time is in effect.
|
||
Formerly they were inconsistent: 'encode-time' returned t in this
|
||
situation, whereas 'parse-time-string' returned nil. Now they
|
||
consistently use use nil to mean that DST is not in effect, and use -1
|
||
to mean that it is not known whether DST is in effect.
|
||
|
||
** New JSON parsing and serialization functions 'json-serialize',
|
||
'json-insert', 'json-parse-string', and 'json-parse-buffer'. These
|
||
are implemented in C using the Jansson library.
|
||
|
||
+++
|
||
** New function 'ring-resize'.
|
||
'ring-resize' can be used to grow or shrink a ring.
|
||
|
||
+++
|
||
** New function 'flatten-tree'.
|
||
'flatten-list' is provided as an alias. These functions take a tree
|
||
and 'flatten' it such that the result is a list of all the terminal
|
||
nodes.
|
||
|
||
+++
|
||
** 'zlib-decompress-region' can partially decompress corrupted data.
|
||
If the new optional ALLOW-PARTIAL argument is passed, then the data
|
||
that was decompressed successfully before failing will be inserted
|
||
into the buffer.
|
||
|
||
** Mailcap
|
||
|
||
---
|
||
*** The new function 'mailcap-file-name-to-mime-type' has been added.
|
||
It's a simple convenience function for looking up MIME types based on
|
||
file name extensions.
|
||
|
||
*** The default way the list of possible external viewers for MIME
|
||
types is sorted and chosen has changed. Earlier, the most specific
|
||
viewer was chosen, even if there was a general override in "~/.mailcap".
|
||
For instance, if "/etc/mailcap" has an entry for "image/gif", that one
|
||
will be chosen even if you have an entry for "image/*" in your
|
||
"~/.mailcap" file. But with the new method, entries from "~/.mailcap"
|
||
overrides all system and Emacs-provided defaults. To get the old
|
||
method back, set 'mailcap-prefer-mailcap-viewers' to nil.
|
||
|
||
** URL
|
||
|
||
*** The 'file:' handler no longer looks for "index.html" in
|
||
directories if you ask it for a "file:///dir" URL. Since this is a
|
||
low-level library, such decisions (if they are to be made at all) are
|
||
left to higher-level functions.
|
||
|
||
** Image mode
|
||
|
||
*** 'image-mode' started using ImageMagick by default for all images
|
||
some years back. It now respects 'imagemagick-types-inhibit' as a way
|
||
to disable that.
|
||
|
||
---
|
||
*** Some 'image-mode' variables are now buffer-local.
|
||
The image parameters 'image-transform-rotation',
|
||
'image-transform-scale' and 'image-transform-resize' are now declared
|
||
buffer-local, so each buffer could have its own values for these
|
||
parameters.
|
||
|
||
** Modules
|
||
|
||
*** The function 'load' now behaves correctly when loading modules.
|
||
Specifically, it puts the module name into 'load-history', prints
|
||
loading messages if requested, and protects against recursive loads.
|
||
|
||
*** New module environment function 'process_input' to process user
|
||
input while module code is running.
|
||
|
||
*** New module environment functions 'make_time' and 'extract_time' to
|
||
convert between timespec structures and Emacs Lisp time values.
|
||
|
||
*** New module environment functions 'make_big_integer' and
|
||
'extract_big_integer' to create and extract arbitrary-size integer
|
||
values.
|
||
|
||
*** emacs-module.h now defines a macro 'EMACS_MAJOR_VERSION' that expands
|
||
to the major version of the latest Emacs supported by the header.
|
||
|
||
+++
|
||
** The function 'read-variable' now uses its own history list.
|
||
The history of variable names read by 'read-variable' is recorded in
|
||
the new variable 'custom-variable-history'.
|
||
|
||
---
|
||
** The function 'string-to-unibyte' and `string-to-multibyte' are no
|
||
longer declared obsolete. We have found that there are legitimate use
|
||
cases for these functions, where there's no better alternative. We
|
||
believe that the incorrect uses of these functions all but disappeared
|
||
by now, so we are un-obsoleting it.
|
||
|
||
+++
|
||
** New function 'group-name' returns a group name corresponding to GID.
|
||
|
||
+++
|
||
** 'make-process' now takes a keyword argument ':file-handler'; if
|
||
that is non-nil, it will look for a file name handler for the current
|
||
buffer's 'default-directory' and invoke that file name handler to make
|
||
the process. That way 'make-process' can start remote processes.
|
||
|
||
+++
|
||
** Emacs now supports resizing and rotating images without ImageMagick.
|
||
All modern systems support this feature. (On GNU and Unix systems,
|
||
Cairo drawing or the XRender extension to X11 is required for this to
|
||
be available; the configure script will test for it and, if found,
|
||
enable scaling.)
|
||
|
||
The new function 'image-transforms-p' can be used to test whether any
|
||
given frame supports these capabilities.
|
||
|
||
+++
|
||
** '(locale-info 'paper)' now returns the paper size on systems that support it.
|
||
This is currently supported on GNUish hosts and on modern versions of
|
||
MS-Windows.
|
||
|
||
+++
|
||
** The function 'regexp-opt' accepts an additional optional argument.
|
||
By default, the regexp returned by 'regexp-opt' may match the strings
|
||
in any order. If the new third argument is non-nil, the match is
|
||
guaranteed to be performed in the order given, as if the strings were
|
||
made into a regexp by joining them with '\|'.
|
||
|
||
+++
|
||
** The function 'regexp-opt', when given an empty list of strings, now
|
||
returns a regexp that never matches anything, which is an identity for
|
||
this operation. Previously, the empty string was returned in this
|
||
case.
|
||
|
||
** New constant 'regexp-unmatchable' contains a never-matching regexp.
|
||
It is a convenient and readable way to specify a regexp that should
|
||
not match anything, and is as fast as any such regexp can be.
|
||
|
||
++++
|
||
** New functions to handle the URL variant of base-64 encoding.
|
||
New functions 'base64url-encode-string' and 'base64url-encode-region'
|
||
implement the url-variant of base-64 encoding as defined in RFC4648.
|
||
|
||
The functions 'base64-decode-string' and 'base64-decode-region' now
|
||
accept an optional argument to decode the URL variant of base-64
|
||
encoding.
|
||
|
||
+++
|
||
** The function 'file-size-human-readable' accepts more optional arguments.
|
||
The new third argument is a string put between the number and unit; it
|
||
defaults to the empty string. The new fourth argument is a string
|
||
representing the unit to use; it defaults to "B" when the second
|
||
argument is 'iec' and the empty string otherwise. We recomment a
|
||
space or non-breaking space as third argument, and "B" as fourth
|
||
argument, circumstances allowing.
|
||
|
||
|
||
* Changes in Emacs 27.1 on Non-Free Operating Systems
|
||
|
||
---
|
||
** Battery status is now supported in all Cygwin builds.
|
||
Previously it was supported only in the Cygwin-w32 build.
|
||
|
||
** Emacs now handles key combinations involving the macOS "command"
|
||
and "option" modifier keys more correctly.
|
||
|
||
** The special handling of 'frame-title-format' on NS where setting it
|
||
to 't' would enable the macOS proxy icon has been replaced with a
|
||
separate variable, 'ns-use-proxy-icon'. 'frame-title-format' will now
|
||
work as on other platforms.
|
||
|
||
---
|
||
** New primitive 'w32-read-registry'.
|
||
This primitive lets Lisp programs access the MS-Windows Registry by
|
||
retrieving values stored under a given key. It is intended to be used
|
||
for supporting features such as XDG-like location of important files
|
||
and directories.
|
||
|
||
+++
|
||
** The default value of 'w32-pipe-read-delay' is now zero.
|
||
This speeds up reading output from sub-processes that produce a lot of
|
||
data.
|
||
|
||
This variable may need to be non-zero only when running DOS programs
|
||
as Emacs subprocesses, which by now is not supported on modern
|
||
versions of MS-Windows. Set this variable to 50 if for some reason
|
||
you need the old behavior (and please report such situations to Emacs
|
||
developers).
|
||
|
||
---
|
||
** New variable 'w32-multibyte-code-page'.
|
||
This variable holds the value of the multibyte code page used by the
|
||
system. It is usually zero, which indicates that 'w32-ansi-code-page'
|
||
is being used, except in Far Eastern locales. When this variable is
|
||
non-zero, Emacs at startup sets 'locale-coding-system' to the
|
||
corresponding encoding, instead of using 'w32-ansi-code-page'.
|
||
|
||
+++
|
||
** On NS the behaviour of drag and drop can now be modified by use of
|
||
modifier keys in line with Apples guidelines. This makes the drag and
|
||
drop behaviour more consistent, as previously the sending application
|
||
was able to 'set' modifiers without the knowledge of the user.
|
||
|
||
** On NS multicolor font display is enabled again since it is also
|
||
implemented in Emacs on free operating systems via Cairo drawing.
|
||
|
||
|
||
----------------------------------------------------------------------
|
||
This file is part of GNU Emacs.
|
||
|
||
GNU Emacs is free software: you can redistribute it and/or modify
|
||
it under the terms of the GNU General Public License as published by
|
||
the Free Software Foundation, either version 3 of the License, or
|
||
(at your option) any later version.
|
||
|
||
GNU Emacs is distributed in the hope that it will be useful,
|
||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
GNU General Public License for more details.
|
||
|
||
You should have received a copy of the GNU General Public License
|
||
along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>.
|
||
|
||
|
||
Local variables:
|
||
coding: utf-8
|
||
mode: outline
|
||
paragraph-separate: "[ ]*$"
|
||
end:
|